中国地理科学 ›› 2016, Vol. 26 ›› Issue (5): 670-678.doi: 10.1007/s11769-015-0736-3

• 论文 • 上一篇    下一篇

Zonal Differences in Correlation Patterns Between Soil Organic Carbon and Climate Factors at Multi-extent

QIN Falyu1,2,3, SHI Xuezheng1,2, XU Shengxiang1, YU Dongsheng1,2, WANG Dandan4   

  1. 1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Guizhou Technology & Information Center of Land and Resources, Guiyang 550004, China;
    4. College of Remote Sensing, Nanjing University of Information Science & Technology, Nanjing 210044, China
  • 收稿日期:2013-12-25 修回日期:2014-02-21 出版日期:2016-10-27 发布日期:2016-08-25
  • 通讯作者: XU Shengxiang.E-mail:sxxu@issas.ac.cn E-mail:sxxu@issas.ac.cn
  • 基金资助:

    Under the auspices of Strategic Priority Research Program-Climate Change:Carbon Budget and Related Issues of Chinese Academy of Sciences (No. XDA05050503), National Key Technology Research and Development Program of China (No. 2013BAD11B00), National Natural Science Foundation of China (No. 41301242)

Zonal Differences in Correlation Patterns Between Soil Organic Carbon and Climate Factors at Multi-extent

QIN Falyu1,2,3, SHI Xuezheng1,2, XU Shengxiang1, YU Dongsheng1,2, WANG Dandan4   

  1. 1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Guizhou Technology & Information Center of Land and Resources, Guiyang 550004, China;
    4. College of Remote Sensing, Nanjing University of Information Science & Technology, Nanjing 210044, China
  • Received:2013-12-25 Revised:2014-02-21 Online:2016-10-27 Published:2016-08-25
  • Contact: XU Shengxiang.E-mail:sxxu@issas.ac.cn E-mail:sxxu@issas.ac.cn
  • Supported by:

    Under the auspices of Strategic Priority Research Program-Climate Change:Carbon Budget and Related Issues of Chinese Academy of Sciences (No. XDA05050503), National Key Technology Research and Development Program of China (No. 2013BAD11B00), National Natural Science Foundation of China (No. 41301242)

摘要:

Studying the relationship between climate factors and soil organic carbon (SOC) is vitally important. However, how SOC responses to climate (temperature and precipitation) at cohesive extents is poorly studied. Two transects of approximately the same length (transect P and transect T) were selected to examine the variation of SOC content in relation to mean annual temperature (MAT) and mean annual precipitation (MAP). The coefficients of partial correlation between SOC density and MAT (Rt) and MAP (Rp) were determined to quantify the relationships between SOC density and the two climate factors. The results indicated that for transect T, Rt was statistically significant once the extent level was greater than or equal to two fundamental extent units, while for transect P, Rp showed statistical significance only at extent levels which were greater than two fundamental extent units. At the same extent levels but in different transects, Rts exhibited no zonal difference, but Rps did once the extent level was greater than two fundamental extent units. Therefore, to study the relationship between SOC density and different climate factors, different minimum extent levels should be examined. The results of this paper could deepen the understanding of the impacts that SOC pool has on terrestrial ecosystem and global carbon cycling.

关键词: soil organic carbon (SOC), mean annual temperature (MAT), mean annual precipitation (MAP), extent level, coefficient of partial correlation

Abstract:

Studying the relationship between climate factors and soil organic carbon (SOC) is vitally important. However, how SOC responses to climate (temperature and precipitation) at cohesive extents is poorly studied. Two transects of approximately the same length (transect P and transect T) were selected to examine the variation of SOC content in relation to mean annual temperature (MAT) and mean annual precipitation (MAP). The coefficients of partial correlation between SOC density and MAT (Rt) and MAP (Rp) were determined to quantify the relationships between SOC density and the two climate factors. The results indicated that for transect T, Rt was statistically significant once the extent level was greater than or equal to two fundamental extent units, while for transect P, Rp showed statistical significance only at extent levels which were greater than two fundamental extent units. At the same extent levels but in different transects, Rts exhibited no zonal difference, but Rps did once the extent level was greater than two fundamental extent units. Therefore, to study the relationship between SOC density and different climate factors, different minimum extent levels should be examined. The results of this paper could deepen the understanding of the impacts that SOC pool has on terrestrial ecosystem and global carbon cycling.

Key words: soil organic carbon (SOC), mean annual temperature (MAT), mean annual precipitation (MAP), extent level, coefficient of partial correlation